Servoactuator with feedback and method of calibrating

Details Servoactuator with feedback and method of calibrating Servoactuator with feedback and method of calibrating

1988-04-05

1990-06-05

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318 15, 338184, 338199, G05B 106

Patent

active

049317105

ABSTRACT:
A low voltage direct current motorized servoactuator having an output gear position feedback potentiometer with a ring gear received initially loosely on the potentiometer shaft and in engagement with the output gear. A collar keyed hinged to the potentiometer shaft, but axially movable thereon, permits the output gear to be positioned independently of the potentiometer for calibration without disengaging the ring gear. With the output gear in the desired position, the potentiometer shaft is rotated until the potentiometer reads the desired percentage of its full scale resistance or voltage output; and, the collar is then moved axially to a press fit with the ring gear to lock the calibration and thereafter to rotate the potentiometer shaft with rotation of the ring gear. The motor drive pinion is a worm formed of material having a minor fraction (18%) of chloro-fluorinated polymer and a lesser fraction (2%) of lubricant, balance polyimide plastic material. The driven gears are formed of material having a minor fraction (18%) of chloro-fluorinated polymer and a lesser fraction (2%) of lubricant, balance acetal plastic material.

REFERENCES:
patent: 4078198 (1978-03-01), Murakosi et al.
patent: 4228386 (1980-10-01), Griffith
patent: 4345195 (1982-08-01), Griffith et al.
patent: 4426607 (1984-01-01), Black et al.
patent: 4616164 (1985-07-01), Kenny et al.
patent: 4656407 (1987-04-01), Burney

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